Received: 2 March 2019
Accepted: 13 August 2019
First Online: 22 August 2019
Ethics approval and consent to participate
: This study was performed in accordance with the Declaration of Helsinki and ethical standards of the institutional research committee. Participants were informed of the aim of this exploration, their right to refuse participation, and their right to withdraw from the study at any time. All participants gave written consent prior to study participation and data publication. No formal ethical approval was sought for this exploration of the training effect, since significant social, emotional, physical, legal, or financial ethical risks were not identified or anticipated.
: Not applicable.
: The authors declare that they have no competing interests.